I'm sorry for the inconvenience caused by the unexpected circumstances. My apologies for any disruption this may have brought about. Please accept my sincere apologies for any inconvenience you may have experienced. Regrettably, we can't to fulfill your request currently. Sorry for any disappointment this may bring. Sorry for any trouble you may have arisen. I apologize if there were any confusion in communication. Please pardon me if my actions have caused disruption. I understand that this may be frustrating. Apologies for any frustration you might have elicited. Rest assured that we are doing our best to resolve the matter as promptly as possible. I sincerely apologize for any inconvenience you might have faced due to this circumstance.